body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
    'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue',
    sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

code {
  font-family: source-code-pro, Menlo, Monaco, Consolas, 'Courier New',
    monospace;
}

#footer{
  position: fixed;
  bottom:0;
  left:0;
  width:100%;
}

.nav{
  width:100%;
  background:white;
  padding:10px;
  box-sizing: border-box;
  text-align: center;
}

.nav a{
  display:inline-block;
  width:32%;
  color:black;
}

.left, .right{
  float: left;
  box-sizing: border-box;
  height:100vh;
  background:pink;
  overflow-y: scroll;
}
.left{
  width:100px;
  background: chartreuse;

}

.right{
  width: calc(100vw - 140px );
}

.category .item{
  border-bottom: 1px solid gray;
  line-height: 30px;
  height:30px;
  cursor: pointer;
}

.hidden{
  display:none;
}

.cartimg{
  width:40px;
  height:40px;
}